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(N0 Model.)

J. O. SGHAEFER & J. A. HAGMAYER.

SAFETY VALVE FOR BEER GASKS.

No. 337,622. Patented MM, 1886.

ATTORNEYS UNITED STATES ATENT OFFICE;

JOHN C. SOHAEFER AND JOHN A. HAGMAYER, OF NEW YORK, N. Y.

SAFETY-VALVE FO R BEER-CASKS.

SPECIFICATION forming part of Letters Patent No. 337,622, dated March 9,1886. Application filed July 16, 1885. Serial No. 171,775. (No mo.!cl.l

T0 at whom it may concern:

Be it known that we, JOHN G. SOHAEFER and JOHN A. HAGMAYEacitizens ofthe United States, residing at New York, in the county and State of NewYork, have invented new and useful ImprovementsinSafety-Valves forBeer-Oasks, of which the following is aspecification.

Our invention relates to improvements in safety-valves for bear-casks;and it consists in an improvement on the invention described in LettersPatent No. 318,040, granted to John O. Schaefer, and dated May 19, 1885,whereby the valve is rendered more efficient and reliable, and allowsthe use of oil or similar fatty lubricants.

Thenovel features of ourpresent invention are fully pointed out in thefollowing specification'and claims, and illustrated in the accompanyingdrawings, in which- Figure l is a side view, partly in section,of ourimproved safety-valve. Fig. 2 is a longitudinal vertical sectionthereof. Fig. 3 is a section of one of its parts.

Similar letters indicate corresponding parts.

In the drawings, the letter A designates the valve-shell, having a holeor passage, b,opening upward, Fig. 2, the edge of which constitutes theseat for a valve-disk, B, of a valve,

B, and it has also a second hole or passage, 0, opening upward, the edgeof which constit'utes the seat for the rubber disk or diaphragm O of arelief-valve, O. The hole or passage 0 is larger in diameter than thehole or passage b, and the diaphragm Ois held toits seat by thevalvestem c, the lower end of which has aturned portion or disk, 0 whichfits intoa collar, 0 so as to be capable of longitudinal motion therein,and bears upon the aforesaid disk or diaphragm. The valve-disk B is alsoarranged on the lower end of a valvestem,b, and both stems are attachedto-a lever, D, carrying an adjustable weight, D.

On the upper portion of the valve-shell A, and surrounding thevalve-stems,is cast or secured a cup or vessel, E, which communicateswith the lnterior of the valveshell through the outlet-orifices F,formed in the cover I)" of the valve-shell which surrounds the valvestemb, and the cup or vessel also communicates with the interior of thecover c of the shell which surrounds the stem 0 through similarorifices, F, in the said cover.

One end of the valve-shell communicates with a branch, G, of astorage-chamber, G, which latter is also provided with a second lateralbranch, G having therein a stop-cock, H, for transmitting air into thebeer-casks should undue pressure arise from the pump,

.flows through the orifices F into the valveshell, and acts as alubricant to the valve-seat and disk B, so that the danger of gumming orfouling of the valve is thus effectually obviated. The water or oil alsoenters the cover 0 and fills the interior of the same. In order to keepthe water or oil from flowing into the beer or other liquid in the caskthrough the branch I, Fig. 2, we form a diaphragm,J, in thestorage-chamber, which emanates from the branch G and extends upward inthe chamber above the level of the upper edge of the cup or vessel E.The water or oil flowing through the holes F in the cover b of thevalve-shell completely fills the interior of the valve-shell, and risesin the channel formed between thediaphragm J and the wall of the chamberup to the level of the water in the cup or vessel.

It will be observed that the cover 0 is screwed down so that itsloweredge impinges on the collar 0 in order that the rubber diaphragm cannotlift from the seat.

The action of the valves is as follows: If by any means an excess ofpressure occurs in the cask the elastic disk or diaphragm of therelief-valve U, having a larger area than the valve-disk B, will befirst bulged upward in its center, and lifts the valve-stem, whereby thepressure due to the weight of the weighted lever will be throwncompletely off the valve B, and the latter will be raised from its seatand so held until the pressure falls to its normal figure.

The object of our present invention is to ICU render it impossible forthe water, oil, or other I valve-seat and a weighted disk, 13, of theperlubricant to find its way into the cask, which was liable to occur inthe sat'etyvalve described in the above-mentioned patent, for the reasonthat in the patent the plate forming the dam does not and cannot extendup above the cup or vessel or above the level of the liquid therein itthe cup or vessel be filled.

From the drawings and description it is evident that in our presentinvention it is impossible for the lubricant to back into the cask, asit cannot pass over the diaphragm J, as the latter rises in the storagechamber to a point above the cup or vessel, or above the level of theoil therein it the cup or vessel be tilled to or near its top, andconsequently oil or similar fatty lubricants can be employed in thisvalve without danger of deterioration to the liquid in the cask. It willalso be observed that by placing the cup or vessel 1*] above thevalveshell, and having the diaphragm in the storage-chamber, both theupper and lower faces of the valve-disks and also part of the stems arecompletely surrounded by the lubricant. In order that the lubricant canbe emptied from the vessel and valveshell or only from the valve-shell,if desired, and also that ac cess maybe had to the shell for cleaningpurposes, we provide one end of the latter with a plug, K, which can beeasily removed and the liquid allowed to run out from the shell, andwhen the liquid in the vessel is also to be emptied the valve must belifted and held from its seat.

Another object of our present invention is to secure greater reliabilityand promptu ess in the action ot the valve, and for this purpose weiirtroduce the secondary or reliefvalve O, with its elastic disk ordiaphragm. It is evident that the said relief-valve could be entirelydispensed with without interfering with the action of the valve B; butfor the reasons above given we prefer the use of the reliefvalve incombination with the latter.

To observe the pressure in the chamber, an

ordinary pressure-gage can be secured to the' top of the same.

What we claim as new, and desire to secure by Letters Patent, is-

l. The combination, with the valveshell A and the lubricating cup orvessel E, having a forated cover I), arranged in the lubricating cup orvessel, the storage-chamber G, and the diaphragm J, rising from thevalve-shell in the storage-chamber to or above the level of the upperportion of the lubricating cup or vessel, substantially as and for thepurpose described.

2. The combination, substantially as hereinbet'ore described, with thevalve'shell and the chamber, of the valveseat, the weighted valve-diskB, the lubricating cup orvessel communicating with the outlet-orifice ofthe valve, and the diaphragm extending upward from the valve-shell to orabove the level of the upper edge of the cup or vessel.

3. The combination, with the valve-shelland the chamber, of the weightedvalve-disk, the lubricating cup or vessel on the valve-shell, theoutlet-orifices in the cover opening into the said vessel, and thediaphragm in the chamber extending upward from the valveshell to orabove the plane of the upper edge of the vessel, substantially as shownand described.

4. The combination, substantially as hereinbetoredescribed, with thevalveshell and the chamber, of the valveseats b and c, the disk B,fitting the seat Z), the weighted reliefdisk (3, fitting the seat 0, thecup or vessel con necting with the valve-shell, and the diaphragm in thechamber.

5. The combination. sul'istantially as hereinbel'ore described, with thevalve-shell and the chamber, of the valve-seats I) and c, the

disk B, fitting the seat I) and connected to a weighted lever, theelastic disk or diaphragm O onthe seat 0, connected with andsnstainingthe weight of the lever, the cup or vessel communicating with thevalve-shell, and the diaphragm in the chamber extending upward from thevalveshell to or above the level of the upper edge of the cup.

In testimony whereof we have hereunto set our hands in the presence oftwo subscribing witnesses.

J OHN G. SCHAEFER. JOHN A. HAGMAYER.

Witnesses:

W. HAUFF, E. F. KASTENHUBER.

